:root {
    --background: #f5f7fa;
    --surface: #ffffff;
    --surface-secondary: #f8fafc;
    --sidebar: #0f172a;
    --text: #111827;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --primary: #2563eb;
    --primary-light: #eff6ff;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --radius: 14px;
    --shadow:
        0 1px 2px rgba(15, 23, 42, 0.03),
        0 8px 24px rgba(15, 23, 42, 0.05);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--background);
    color: var(--text);
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

.hidden {
    display: none !important;
}

.app-layout {
    display: grid;
    grid-template-columns: 255px minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 24px 18px;
    background: var(--sidebar);
    color: white;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px 24px;
    border-bottom:
        1px solid
        rgba(255, 255, 255, 0.08);
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: white;
    color: var(--sidebar);
    font-size: 13px;
    font-weight: 800;
}

.brand-title {
    font-size: 15px;
    font-weight: 700;
}

.brand-subtitle {
    margin-top: 3px;
    color: rgba(255, 255, 255, 0.45);
    font-size: 11px;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 25px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 12px;
    border-radius: 9px;
    color: rgba(255, 255, 255, 0.62);
    font-size: 14px;
    transition: 0.2s;
}

.nav-link:hover,
.nav-link.active {
    background:
        rgba(255, 255, 255, 0.08);
    color: white;
}

.nav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    font-weight: 700;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top:
        1px solid
        rgba(255, 255, 255, 0.08);
}

.sidebar-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 12px;
}

.sidebar-version {
    margin-top: 2px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 10px;
}

.status-dot {
    display: inline-block;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--success);
    box-shadow:
        0 0 0 4px
        rgba(22, 163, 74, 0.12);
}

.status-dot.offline {
    background: var(--danger);
}

.main-content {
    min-width: 0;
    padding: 32px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 26px;
}

.eyebrow {
    margin: 0 0 7px;
    color: var(--primary);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.topbar h1 {
    margin: 0;
    font-size: 32px;
    letter-spacing: -0.04em;
}

.topbar-description {
    margin: 7px 0 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.topbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.button {
    min-height: 40px;
    padding: 9px 15px;
    border: 1px solid var(--sidebar);
    border-radius: 9px;
    background: var(--sidebar);
    color: white;
    font-size: 12px;
    font-weight: 700;
    transition: 0.2s;
}

.button:hover {
    opacity: 0.88;
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.button-secondary {
    border-color: var(--border);
    background: white;
    color: var(--text);
}

.button-danger {
    border-color: #fecaca;
    background: white;
    color: var(--danger);
}

.button-small {
    min-height: 32px;
    padding: 6px 9px;
    font-size: 10px;
}

.metrics-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.metric-card,
.small-stat,
.panel {
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.metric-card {
    padding: 20px;
    border-radius: var(--radius);
}

.metric-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 700;
}

.metric-icon {
    padding: 8px;
    border-radius: 8px;
    background: var(--surface-secondary);
    font-size: 9px;
    font-weight: 800;
}

.metric-value {
    margin-top: 15px;
    font-size: 31px;
    font-weight: 750;
}

.metric-description {
    min-height: 18px;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 11px;
}

.progress {
    height: 7px;
    margin-top: 17px;
    overflow: hidden;
    border-radius: 999px;
    background: #edf1f5;
}

.progress-bar {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: var(--primary);
    transition: 0.4s;
}

.uptime-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    color: var(--text-secondary);
    font-size: 11px;
}

.stats-grid {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 18px;
}

.small-stat {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 17px 19px;
    border-radius: var(--radius);
}

.small-stat-label {
    color: var(--text-secondary);
    font-size: 11px;
}

.small-stat-value {
    margin-top: 5px;
    font-size: 22px;
    font-weight: 750;
}

.small-stat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 8px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 10px;
    font-weight: 800;
}

.alert-icon {
    background: var(--danger-light);
    color: var(--danger);
}

.content-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 1.5fr)
        minmax(300px, 0.5fr);
    gap: 20px;
    margin-top: 20px;
}

.panel {
    overflow: hidden;
    border-radius: var(--radius);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    margin: 0;
    font-size: 17px;
}

.panel-header p {
    margin: 5px 0 0;
    color: var(--text-secondary);
    font-size: 11px;
}

.panel-badge {
    padding: 5px 9px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 9px;
    font-weight: 800;
    text-transform: uppercase;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 10px;
    text-align: left;
    text-transform: uppercase;
}

td {
    padding: 15px;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
}

tbody tr:last-child td {
    border-bottom: 0;
}

tbody tr:hover {
    background: #fafbfc;
}

.host-name {
    font-weight: 700;
}

.host-address {
    margin-top: 4px;
    color: var(--text-secondary);
    font-family: Consolas, monospace;
    font-size: 10px;
}

.action-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 700;
}

.badge-success,
.service-status-online {
    background: var(--success-light);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-light);
    color: var(--warning);
}

.badge-danger,
.service-status-down {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-info {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-neutral,
.service-status-unknown,
.service-status-disabled {
    background: #f1f5f9;
    color: var(--text-secondary);
}

.alerts-list {
    display: flex;
    flex-direction: column;
    gap: 11px;
    padding: 16px;
}

.alert-item {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-secondary);
}

.alert-header {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.alert-title {
    margin: 0;
    font-size: 12px;
    font-weight: 700;
}

.alert-message {
    margin: 7px 0 0;
    color: var(--text-secondary);
    font-size: 11px;
    line-height: 1.5;
}

.alert-date {
    margin-top: 9px;
    color: #94a3b8;
    font-size: 9px;
}

.empty-state {
    padding: 28px;
    color: var(--text-secondary);
    text-align: center;
    font-size: 12px;
}

.error-message {
    padding: 13px;
    border: 1px solid #fecaca;
    border-radius: 9px;
    background: #fef2f2;
    color: #b91c1c;
    font-size: 11px;
}

.services-panel,
.history-panel {
    margin-top: 20px;
}

.services-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 14px;
    padding: 18px;
}

.services-empty {
    grid-column: 1 / -1;
}

.service-card {
    display: flex;
    align-items: flex-start;
    gap: 13px;
    min-height: 175px;
    padding: 15px;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: var(--surface-secondary);
}

.service-card.service-disabled {
    opacity: 0.55;
}

.service-port {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 40px;
    padding: 0 7px;
    border-radius: 9px;
    background: var(--sidebar);
    color: white;
    font-size: 10px;
    font-weight: 800;
}

.service-content {
    flex: 1;
    min-width: 0;
}

.service-header {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.service-header h3 {
    margin: 0;
    font-size: 13px;
}

.service-host {
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 10px;
}

.service-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}

.service-meta-item {
    padding: 4px 7px;
    border-radius: 6px;
    background: #eef2f7;
    color: var(--text-secondary);
    font-size: 9px;
    font-weight: 700;
}

.service-status-row {
    margin-top: 13px;
    padding-top: 11px;
    border-top: 1px solid var(--border);
}

.service-response-time,
.service-last-check {
    color: var(--text-secondary);
    font-size: 9px;
}

.service-last-check {
    margin-top: 7px;
}

.service-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 12px;
}

.history-content {
    padding: 18px;
}

.charts-grid {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.chart-card {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-secondary);
}

.chart-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.chart-header h3 {
    margin: 0;
    font-size: 13px;
}

.chart-header p {
    margin: 4px 0 0;
    color: var(--text-secondary);
    font-size: 10px;
}

.chart-value {
    font-size: 19px;
    font-weight: 800;
}

.chart {
    min-height: 190px;
    margin-top: 14px;
}

.chart svg {
    display: block;
    width: 100%;
    height: 190px;
}

.chart-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 190px;
    color: var(--text-secondary);
    font-size: 11px;
}

.history-section {
    margin-top: 22px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.history-section-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.history-section-header h3 {
    margin: 0;
    font-size: 14px;
}

.history-section-header p {
    margin: 5px 0 0;
    color: var(--text-secondary);
    font-size: 10px;
}

.availability-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.availability-period-controls {
    display: inline-flex;
    flex-shrink: 0;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--surface-secondary);
}

.availability-period-button {
    min-height: 30px;
    padding: 6px 10px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 700;
    transition: 0.2s;
}

.availability-period-button:hover {
    background: white;
    color: var(--text);
}

.availability-period-button.active {
    background: var(--sidebar);
    color: white;
    box-shadow:
        0 1px 3px
        rgba(15, 23, 42, 0.16);
}

.availability-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 12px;
    padding: 16px;
}

.availability-card {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface-secondary);
}

.availability-top {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.availability-name {
    font-size: 12px;
    font-weight: 700;
}

.availability-host {
    margin-top: 4px;
    color: var(--text-secondary);
    font-size: 9px;
}

.availability-value {
    margin-top: 14px;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.availability-details {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 9px;
    line-height: 1.5;
}

.availability-bar {
    height: 6px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

.availability-bar-fill {
    height: 100%;
    border-radius: inherit;
    background: var(--success);
}

.availability-bar-fill.warning {
    background: var(--warning);
}

.availability-bar-fill.danger {
    background: var(--danger);
}

.footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 2px 0;
    color: #94a3b8;
    font-size: 10px;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background:
        rgba(15, 23, 42, 0.58);
}

.modal-overlay.open {
    display: flex;
}

.modal {
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 22px;
    border-radius: 16px;
    background: white;
    box-shadow:
        0 25px 70px
        rgba(15, 23, 42, 0.25);
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
}

.modal-header p {
    margin: 5px 0 0;
    color: var(--text-secondary);
    font-size: 11px;
}

.modal-close {
    width: 34px;
    height: 34px;
    border: 0;
    border-radius: 8px;
    background: #f1f5f9;
    color: var(--text);
    font-size: 22px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 11px;
    font-weight: 700;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
    background: white;
    color: var(--text);
    font-size: 12px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow:
        0 0 0 3px
        rgba(37, 99, 235, 0.08);
}

.form-grid {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 20px;
    font-size: 11px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: min(
        360px,
        calc(100vw - 40px)
    );
}

.toast {
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: white;
    box-shadow:
        0 15px 40px
        rgba(15, 23, 42, 0.16);
    font-size: 12px;
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-error {
    border-left: 4px solid var(--danger);
}

.toast-info {
    border-left: 4px solid var(--primary);
}

@media (max-width: 1200px) {
    .metrics-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .services-grid,
    .availability-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 850px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        height: auto;
    }

    .nav {
        flex-direction: row;
        overflow-x: auto;
    }

    .nav-link {
        flex-shrink: 0;
    }

    .sidebar-footer {
        display: none;
    }
}

@media (max-width: 650px) {
    .main-content {
        padding: 18px;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
    }

    .metrics-grid,
    .stats-grid,
    .services-grid,
    .availability-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .topbar-actions {
        width: 100%;
    }

    .footer {
        flex-direction: column;
    }

    .availability-section-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .availability-period-controls {
        width: 100%;
    }

    .availability-period-button {
        flex: 1;
    }
}